Automatic governing mechanism for constant fluid-pressure.



.AUTOMATIC GOVERNIN PATENTBD AUG. 4, 1908. P. H. BROWN. Y n G MEG'HANISMPOR CNSTANT FLUID PRESSURE.

APPLICATION FILED MAY 17, 1907.

f l l i i i,

'FRANcIs H.

BROWN, OFVPHILADELPHIA, PENNSYLVANIA, SSIGNOR T0 COMBSTION-A iENGINEERING COMPANY, A CORPORATION` OF DELAWARE.

AUTOMATIC GOVERNING FOB. CONSTANT FLUID-PRESSU'*BS-Ei To all whom 'itmay concern:

Be it known that I, FRANCIS H. BROWN, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and useful Automatic Governin Mechanism for ConstantF luid-Pressure, owhich the following is a specification.

In a co-pendin'g application, filed April 25, 1907, Serial No. 370,160,I have described and broadly claimed a noveland useful construction of acombustion and damper regulator which is adapted to be employed inconnection With any d sired ype of furnace in order that the passage ofthe products of com# bustion from the furnace may be automaticallycontrolled under-allconditions, so that the combustion of fuelithefurnace is properly regulated and the combustion is effected undersubstantially unifdrmconditions.

In my present invent 'nivhich may be used to advantage in conj ctionWith a construction such as is disclosed inthe above mentionedapplication, I haveilevised e. novel and useful 'constructionof'controll` mechanism whereby the draft of the furnace is automaticallycontrolled by novel mechan.

ism actuated by the variations in the steam pressure of the boiler.

To the above ends, my invention in its broad aspects comprises novelmeans controlled by fluid pressure for automatically actuating agoverning mechanism.

It further consists of means such as a. blower driven at a constantspeed for producing a constant pressure in a conduit, said conduithaving al branch leading therefrom and communicating. with one or morefurnaces below the grate, another conduit or by-pass being also providedwhich discharges into the atmosphere 'or leads to a desired point ofutilization, each of said conduits branching from the main conduit beingprovided with a. damper, both of which are actuated by a motor,controlled by mechanism regulated by the variation in the steam pressurein the boiler.

It further consists of other novel features of construction, all as willbe hereinafter fully set forth. A

For the purpose of illustrating my invention, I have shown inthe accomanying drawings, one form thereof since em; bodimen't willgive inractice satisfactory and reliable results, alt ough it is to be un-Specification of Letters Patent.v Application med my 11. 1am. sexilum."au,241.

resented Ang. 4., 1908.

vderstood that the instrumentalities of which my invention' consists canbe variously arranged and organized andthat my invention is not limitedto the precise arrangement and organization of these instrumentalitiesas herein set forth.

Figure 1 represents a side elevation, partly broken away, of a furnacehaving an automatic controlling mechanism embodying my inventionconnected therewith. -F ig. 2 represents a sectional view of anotherembodiment of a valve or damper whichA may be employedif desired.enlarged sale, s. portion of Fig. 1 showing the levers employed foractuating the valves or dempers.

Similar numerals of reference indicate corresponding parts in the gures.

Referring to the drewingsz-Since my .present invention may, if desired,be emsuch. as is disc osed in my above mentioned application, I havepreferred show the same as being connected therewith.

Fig. 3 represents on an ployed in conunction with a construction 1designates a furnace of 'any suitable or '80 conventional type, providedwith a grate 2 end having a discharge pipe or outlet 3 leading from thecombustion chamber 4. The

passage of the products of combustion from se the chamber 4 into theoutlet 3 is controlled by means of a damper 5 pivoter] therein, to whichis secured an arm 6 provided with a suitable counter-balance 7 andhaving 'a cord 8, one end of which is secured to the arm 6,

the other end thereof being secured to a suitable piston or other motor9, as tviil be readily understood from my prior application to which Ihave hereinbefore referred.

' 10 desi'nates the valve mechanism which controls the passage of fluidto actuatethe moto'r 9, said valve mechanism 10 being o perativelyconnected with the -pivoted bla' e -11 mounted inthe boxelike casing 12which is open at the to in order that said pivoted member 11 may e actedupon inv one direcplreric air, the opposite side of said member emgexposed to the pressure of the furnace gases which enter through theconduit 13 int-im the casing member 12. Y

14 designates the boiler having a conduit 15 lea therefrom andcommunicating With a casing 16 in which is mounted a diaphrm 17, towhich latter is secured a stem 1s,

tion by a constant pressure such as atmose upper end of which extendsthrough 11 i vleys 29 an the top of thecasing 16 and isoperativelyconnected with or e wages a lever 19, one end of which is pivote orulcrumed at 20 to a suitable fined point. Y 21 designates a valve, thestem of whichv is connected to the lever 19 and is adapted to controlaninlet port 22 and an outlet port 23 of a valve casing which has aconduit 24 leading therefrom and opening into the piston leasing 25 inwhich is mounted a iston 26.V l 27 designates adjustable an "removableweights mounted on the stem of the piston 26. 28 designates a coi-d orcable secured to the stem of the iston 26 which passes over pul- 30supported in any suitable manner, the end of said cable being secured toa .rod 31 upon which are adjustably secured weights 32. l l 33designates ablower mechanism or equivalent device of any suitable orconventional type which, in the resent instance, comrises a fan mountenon a shaft 3,4v to which listter is secured a pulley 35, around whichpasses a driving belt 36, which latter also -asses around apullcy 37mounted on a driv ing shaft 3S driven by an suitable means.

39 designates a conduit leadinnr from the 'Blowing mechanism 33, saidconduit in the resent being divided into two ranches 40 and 41, thebranch 40 communicating the interior' of the furnace below the grate 2,and the conduit 41 terinnat ing at any desired point.

'The conduit 41 may lead to any desired oint of utilization or may beAdischarged dgeely into the atmosphere as desired.

42 des'gnates a `damper pivotally mounted at 43 in the conduit 4 44designates a link one end of which is iixed to the damoer42, `the otherend thereof ha U pivoted thereto, one end of a link 45, the ot er endthereof being pivoted to one end of a lever 46 which is pivoted at 47 toany suitable hired oint.

48 designates a ink, one end of which isY pivoted to the end of thelever 46, the other end thereof seing pivoted at 49 to the rod orconnection 31. l

5() designates'a damper pivoted at 51 in the conduit or byass 41.-

52 designates a r, one eiid'of which is fined to the damper 50, theother end thereof be ff pivot-ed io one end of the'lever 53, ohio ispirated at 54 to a suitable 'xe'd point, the other end-of said lever 53being pivoted to one end of a link 55, the opposite end o f said iinn 55being pivoted at249 to the connection 31.

ln the embodiment seen in Fig. 2, I have shown a modified and simpliiedgerm of conduit mechanism which comprises in the present instance adamper 56 ivoted to a rod 57 and adapted to control t e conduit 40, saidrod 57 having also'pivoted thereto, a damper 58, it being offcourseunh:595,239 i l derstood in practice,` and 58may h emade integralso e'sired.'

The dempers have secured thereto, an arm 59 to which theconnection orconduit 31 can be secured- The operationot my device will n ow be thedam ers 56 readily aplparentzAs the pressureof steam e in the bo pvision ofthe conduit 15 ,the diaphragm 17 in the casing 16 Will'beraised, thereb raising the lever arm 19 and causing the va ve 21 t0close the inlet`22,rthusperniitting the motive fluid Within the casing25 to pass therefrom l through the outlet 23. This will permit theiston` 26 to descend, therebyraising the links 48 and 55 and owing tothemanner in which these links are operatively connected Withthe dempers 42and 50, respectively, the damper 42 will be partially or Wholy closedand the damper 50 Will-be artially or of variation in the steampressure.

r 14 inc`rease's,.oving to the prom Since the blowing mechanism 33AAisalvv'ays" l driven at a constant speed, a' constant pressure of airis reduced, and since the dam er 42 has now een partially closed insteaof the normal proportion of air passin through the conduit 40 to thefurnace, a sma ler quantity will pass thereto, the excess of air assingthrough the conduit 41` which lea s to any desired point.'

It is apparent that the discha er'of the 1 products of combustion fromthe urnace is regulated by the pressure of the furnace gases, since thedamper 5-Wi1l be opened or, closed ovriiigto the manner in which themotor 9 is controlled by the valve mechanism' 10, which latter isactuated by the swinging member v11 acted upon in one direction byconstant ressure and in the o posits direction by t e pressure of theumace gases. which pam thereto through the .conduit 13:

It 'will also be a parent to those skilled ln/ this art that the d)ternately opened and closed. depending u'pon the pressure of steam inthe boiler 14, since when the cord or cable 31 is drawn upward, thedamper 56 will close the conduit 40, and the damper 58 will erniit theexcess of premura to pass throng the branch or conduit 41, 'which maydischarge at any deanipers-'and 58 will be.' A :5

ico

sired point of utilization Yor to the atmosphere.

ln the devices heretofore employed in controlling the draft of thefurnace, 1t' has been deems mechanism for controlling t mism and so faras' I am aware I am the I. rst in theart to employ a mechanism m Whollyopened depending upon t e amount' y necessary to em loy complicated gieblowing mechautomatically controlled by suitable valve or othermechanism and my claims tothese. g features are to be'inteipreted withcorre-5 spondiiig scope.

In my present inventionfl have shown my g novel construction ofregulating mechanism as adapted to automatically control the passage ofair through a plurality of conduits, but it will be apparent that it maybe emi ployed to control the pass-sage of any desired lluid such aswater, oil or gas and furthermore that it is controlled by variations ofi )ressurc of any desired lluid and is not liml ited to use inconjunction with a. steam boiler.

The ,device may also he employed to eon trol the speed of an engine fordriving a blower or other mechanism, or for maintaining a constant waterlevel in the boiler.

lt will be further apparent that w'iiile I have preferred in the presentease to show a damper as employed in a conduit, any desired orconventional type of valve may be employed.

lt will now be apparent from the foregoing that I have devised a noveland useful construction of an automatic regulating niech anism whichembodies the features of advantage enumerated as desirable in thestatement o f invention and the above description and while. I have, inthe present instance, shown and described one embodiment thereof whichwill give in practice satisfactory and reliable results, it is to beunderstood that it l is susceptible of modification in various pargtieulars without departing from the spirit and scope of the invention orsacrificing any of its advantages.

llaving t-lius described my invention, what l elaini as ncwand desire tosecure by Letters 1iatent, is:-

l. ln a regulatingmechanism, the combination with a. boiler, of meansfor producing a constant draft, and devices regulated by Q the variationin steam pressure for automatl ieally causing a desired quantity of airto A pass to the furnace and the excess to a, de sired point ofutilization..

2. In a regulating mechanism, the combi nation with a boiler, of meansfor producing a draft of constant pressurt, a conduit lead- '50 ingtherefrom to the furnace, a branch from said conduit, dampcrs in saidconduit and 5 branch, and means controlled by the variation of steampressure in said boiler for s im'ultaneously opening one -and closingthe 55 other of said dampers.

i e In a regulating mechanism, the combination with a boiler, of meansfor producing a draft of constant pressure, a conduit leading therefromto the furnace, abrancli from 60 said conduit, valves for controllingsaid'conduit and branch, and means controlled by the variation of steampressure in said boiler for simultaneously opennig one and closing theother of said valves. 65

4. In a draft regulator, the. combination with a furnace and its boiler,of a draft producing device, 'means for actuating` said de. vice at aconstant speed, a conduit having at plurality of branches leading fromsaid de- 70 vice, one of said branches communicating with the furnacebeneath its grate, dampexs operatively connected with .each other andeontrolhiigsaid branches, a motor controlling l said danipers and valvemechanism control- 'I5 ling said motor and means actuated bythevariations in steam pressure for automatically controlling said valvemechanism.

5. ln a furnace, the combination with its boiler, of -draft producingmechanism, driv- 80 ing means for actuating the latter at a con stantspeed, a conduitl from said niechanisn'i communicating with the furnacebeneath its` j grate, a branch from said conduit, a motor controlled byvariations in s'teani pressure in S5 said boiler, and valves in saidconduit and branch controlled by said motor, one. of said valves beingadapted to simultaneously open as the other of said valves closes.

FRANCIS lLBlJtOW. lVitnesses: l A

lliniinsirr S. Faniasits, C. l). MCVAY.

